Pivot fan



FIG. 1 is a front elevational view of a pivot fan showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a right side elevational view thereof, the left side being a mirror image of that shown. 

The ornamental design for a pivot fan, as shown and described. 